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Who described the first action spectrum for photosynthesis?
- a)T. W. Engelmann
- b)Cornelius van Niel
- c)Joseph Priestley
- d)Julius von Sachs
Correct answer is option 'A'. Can you explain this answer?
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Who described the first action spectrum for photosynthesis?a)T. W. Eng...
Engelmann used a prism to split light into its spectral components, and then illuminated a green alga, Cladophora, placed in a suspension of aerobic bacteria. The bacteria were used to detect the sites of oxygen evolution.
He observed that bacteria mainly accumulated in the region of blue and red light of the split spectrum, thus giving the first action spectrum of photosynthesis.
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Who described the first action spectrum for photosynthesis?a)T. W. Eng...
The first action spectrum for photosynthesis was described by T.W. Engelmann.
Explanation:
• T.W. Engelmann was a German botanist who conducted experiments on photosynthesis in the late 19th century.
• He used a prism to split light into its component colors and then exposed different parts of a filamentous alga (Spirogyra) to each color.
• He then measured the rate of oxygen production in each part of the alga using a microspectroscope.
• Engelmann found that the algae produced the most oxygen in the blue and red parts of the spectrum, indicating that these wavelengths were most effective in driving photosynthesis.
• He then plotted his results on a graph, which showed the first action spectrum for photosynthesis.
• This discovery was significant because it helped to establish the importance of chlorophyll in photosynthesis and provided a way to measure the efficiency of photosynthesis under different light conditions.
In summary, T.W. Engelmann described the first action spectrum for photosynthesis by using a prism to split light into its component colors and measuring the rate of oxygen production in different parts of an alga exposed to each color.
Explanation:
• T.W. Engelmann was a German botanist who conducted experiments on photosynthesis in the late 19th century.
• He used a prism to split light into its component colors and then exposed different parts of a filamentous alga (Spirogyra) to each color.
• He then measured the rate of oxygen production in each part of the alga using a microspectroscope.
• Engelmann found that the algae produced the most oxygen in the blue and red parts of the spectrum, indicating that these wavelengths were most effective in driving photosynthesis.
• He then plotted his results on a graph, which showed the first action spectrum for photosynthesis.
• This discovery was significant because it helped to establish the importance of chlorophyll in photosynthesis and provided a way to measure the efficiency of photosynthesis under different light conditions.
In summary, T.W. Engelmann described the first action spectrum for photosynthesis by using a prism to split light into its component colors and measuring the rate of oxygen production in different parts of an alga exposed to each color.
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Who described the first action spectrum for photosynthesis?a)T. W. Engelmannb)Cornelius van Nielc)Joseph Priestleyd)Julius von SachsCorrect answer is option 'A'. Can you explain this answer?
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